They used cameras aboard the LRO to create the high-resolution mosaic of our moon's north polar region.

"This unique image is a tremendous resource for scientists and the public alike," John Keller, LRO project scientist at NASA's Goddard Space Flight Center in Maryland was quoted as saying in a Daily Mail report.

According to Mark Robinson, principal investigator for the LRO at Arizona State University, "creation of this giant mosaic took four years and a huge team effort".